Yes, there are advantages to wiring to a seperate accessory transformer as Gilly pointed out. I see 6 switches on your layout. It should be doable. A good rule of thumb I've found is power feeds to the track every 6' or so. You are probably good with 2 feeds per loop, depending on your track and it's conductivity, but if you are slowing down in curves, you may want a few more. Build it. Good Luck
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